1520325 has 36 divisors (see below), whose sum is σ = 2829060. Its totient is φ = 779520.

The previous prime is 1520291. The next prime is 1520329. The reversal of 1520325 is 5230251.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 123201 + 1397124 = 351^2 + 1182^2 .

It is not a de Polignac number, because 1520325 - 2⁸ = 1520069 is a prime.

It is a super-2 number, since 2×1520325² = 4622776211250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1520298 and 1520307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1520329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6409 + ... + 6641.

It is an arithmetic number, because the mean of its divisors is an integer number (78585).

2^1520325 is an apocalyptic number.

1520325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1520325 is a deficient number, since it is larger than the sum of its proper divisors (1308735).

1520325 is a wasteful number, since it uses less digits than its factorization.

1520325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278 (or 270 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 1520325 is about 1233.0145984537. The cubic root of 1520325 is about 114.9861356947.

Adding to 1520325 its reverse (5230251), we get a palindrome (6750576).

The spelling of 1520325 in words is "one million, five hundred twenty thousand, three hundred twenty-five".